On 5/5/11 9:11 AM, Jan Kara wrote: > On Thu 05-05-11 08:49:14, Eric Sandeen wrote: >> On 5/5/11 7:10 AM, Jan Kara wrote: >>> In do_get_write_access() we wait on BH_Unshadow bit for buffer to get >>> from shadow state. The waking code in journal_commit_transaction() has >>> a bug because it does not issue a memory barrier after the buffer is moved >>> from the shadow state and before wake_up_bit() is called. Thus a waitqueue >>> check can happen before the buffer is actually moved from the shadow state >>> and waiting process may never be woken. Fix the problem by issuing proper >>> barrier. >> >> needed for jbd/commit.c as well, I guess? > Yes, I was already queued in my tree. I just sent it to the list as well. sorry, sometimes "we" forget :) Thanks! -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
